Apache - mod_oc4j in 10.1.3 AS error connections

Question

We are experiencing a lot of
[Thu Apr 17 12:33:23 2008] [warn] [client xxxxxx] oc4j_socket_recvfull timed out
[Thu Apr 17 12:33:23 2008] [warn] [client xxxxxx] oc4j_socket_recvfull timed out
[Thu Apr 17 12:33:23 2008] [error] [client xxxxxx] [ecid: 1208428101:yyyyyy:22954:0:9,0] mod_oc4j: request to OC4J yyyyyy:12501 failed: recv failed (errno=4)
in the apache's error_log
We have installed AS 10.1.3 in cluster with a db 10 oracle in backend. All this working with
webservices and pl/sql's.
A request is received in the front end apache's AS10.1.3, this configured with the oc4j with the parameters
Oc4jSelectMethod metric:local
The weird thing here is that this errors appears suddenly without any increase of requests
and this comes with an increase of queue and clients of the apache, all frozen.
ANY ideas?

Answer 1

Hi.
Thanks in advance.
I don't know any value for available ports in the oc4j configuration. I have the MaxClients of apache and the pool of the datasource, but not in OC4J. ( except the thread pool, and I have no limit here )
I have an strace of the apache's child when errors appear :
write(10, "[Thu Apr 17 12:27:55 2008] [warn] [client xxxxxxx] oc4j_socket_recvfull timed out\n", 88) = 88
close(32) = 0
sigreturn() = ? (mask now [])
close(33) = 0
time(NULL) = 1208428075
write(10, "[Thu Apr 17 12:27:55 2008] [error] [client xxxxxxxx] [ecid: 1208427773:yyyyyyy:25365:0:1,0] mod_oc4j: request to OC4J yyyyyy:12501 failed: Connect failed\n", 171) = 171
fcntl64(12, F_SETLKW, {type=F_RDLCK, whence=SEEK_SET, start=0, len=0}) = 0
fcntl64(12, F_SETLKW, {type=F_UNLCK, whence=SEEK_SET, start=0, len=0}) = 0
time(NULL) = 1208428075
write(23, xxxxx - - [17/Apr/2008:12:27:55 +0200] \"POST /NNNNNNNNNN HTTP/1.1\" 500 0\n", 142) = 142
gettimeofday({1208428075, 56835}, NULL) = 0
gettimeofday({1208428075, 56887}, NULL) = 0
times({tms_utime=0, tms_stime=0, tms_cutime=0, tms_cstime=0}) = 487874322
gettimeofday({1208428075, 57042}, NULL) = 0
gettimeofday({1208428075, 57096}, NULL) = 0
open("/aplicaciones/oraclews3/Apache/Apache/logs/dms_metrics_3888.lock", O_WRONLY|O_CREAT, 026777767750) = 32
fcntl64(32, F_SETLKW, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0}) = 0
fcntl64(32, F_SETLKW, {type=F_UNLCK, whence=SEEK_SET, start=0, len=0}) = 0
close(32) = 0
close(-1) = -1 EBADF (Bad file descriptor)
gettimeofday({1208428075, 57571}, NULL) = 0
rt_sigaction(SIGUSR1, {0x80682f2, [], SA_RESTORER|SA_INTERRUPT, 0xb24918}, {SIG_IGN}, 8) = 0
fcntl64(29, F_SETLKW, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0}) = ? ERESTARTSYS (To be restarted)
--- SIGUSR1 (User defined signal 1) @ 0 (0) ---
rt_sigaction(SIGHUP, {SIG_IGN}, {0x8068342, [], SA_RESTORER|SA_INTERRUPT, 0xb24918}, 8) = 0
rt_sigaction(SIGUSR1, {SIG_IGN}, {0x80682f2, [], SA_RESTORER|SA_INTERRUPT, 0xb24918}, 8) = 0
futex(0x82ec3b4, FUTEX_WAKE, 1) = 0
) = 1
futex(0x82ec3b0, FUTEX_WAIT, 2, NULLfutex(0x82ec3b0, FUTEX_WAKE, 1) = -1 EAGAIN (Resource temporarily unavailable)